From patchwork Thu Sep 28 06:15:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Kuai X-Patchwork-Id: 13402014 X-Patchwork-Delegate: song@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C089ACE7B00 for ; Thu, 28 Sep 2023 06:22:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230469AbjI1GWd (ORCPT ); Thu, 28 Sep 2023 02:22:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47916 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230335AbjI1GWU (ORCPT ); Thu, 28 Sep 2023 02:22:20 -0400 Received: from dggsgout11.his.huawei.com (unknown [45.249.212.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6FD9CDD; Wed, 27 Sep 2023 23:22:07 -0700 (PDT) Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4Rx3Kl6Q4Sz4f3kkS; Thu, 28 Sep 2023 14:22:03 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgAnvdyCGxVl3v1WBg--.22861S23; Thu, 28 Sep 2023 14:22:04 +0800 (CST) From: Yu Kuai To: xni@redhat.com, agk@redhat.com, snitzer@kernel.org, dm-devel@redhat.com, song@kernel.org Cc: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, yukuai3@huawei.com, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com Subject: [PATCH -next v3 19/25] md: use new apis to suspend array for adding/removing rdev from state_store() Date: Thu, 28 Sep 2023 14:15:37 +0800 Message-Id: <20230928061543.1845742-20-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230928061543.1845742-1-yukuai1@huaweicloud.com> References: <20230928061543.1845742-1-yukuai1@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: gCh0CgAnvdyCGxVl3v1WBg--.22861S23 X-Coremail-Antispam: 1UD129KBjvJXoW7Kr4kXFWftFWfGw1kAF15CFg_yoW8tr43pw 47ta4rury7Jw43Gw45Zw4kua45twn7KrWqyrZ3uw1fA3WxGw13Gw15tr1kJFyFvasI9r15 Jw4jgw45G348JFDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUP214x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr1j6r xdM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0D M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjx v20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1l F7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2 IY04v7MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAF wI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc4 0Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r4j6ryUMIIF0xvE2Ix0cI8IcVCY1x0267AK xVW8Jr0_Cr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8JV WxJwCI42IY6I8E87Iv6xkF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7VUbmZ X7UUUUU== X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org From: Yu Kuai User can write 'remove' and 're-add' to trigger array reconfiguration through sysfs, suspend array in this case so that io won't concurrent with array reconfiguration. And now that all the caller of add_bound_rdev() alread suspend the array, remove mddev_suspend/resume() from add_bound_rdev() as well. Signed-off-by: Yu Kuai --- drivers/md/md.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 957813b7d7e5..c5fb75b066b5 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -2940,11 +2940,7 @@ static int add_bound_rdev(struct md_rdev *rdev) */ super_types[mddev->major_version]. validate_super(mddev, rdev); - if (add_journal) - mddev_suspend(mddev); err = mddev->pers->hot_add_disk(mddev, rdev); - if (add_journal) - mddev_resume(mddev); if (err) { md_kick_rdev_from_array(rdev); return err; @@ -3697,6 +3693,7 @@ rdev_attr_store(struct kobject *kobj, struct attribute *attr, struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr); struct md_rdev *rdev = container_of(kobj, struct md_rdev, kobj); struct kernfs_node *kn = NULL; + bool suspend = false; ssize_t rv; struct mddev *mddev = rdev->mddev; @@ -3704,17 +3701,23 @@ rdev_attr_store(struct kobject *kobj, struct attribute *attr, return -EIO; if (!capable(CAP_SYS_ADMIN)) return -EACCES; + if (!mddev) + return -ENODEV; - if (entry->store == state_store && cmd_match(page, "remove")) - kn = sysfs_break_active_protection(kobj, attr); + if (entry->store == state_store) { + if (cmd_match(page, "remove")) + kn = sysfs_break_active_protection(kobj, attr); + if (cmd_match(page, "remove") || cmd_match(page, "re-add")) + suspend = true; + } - rv = mddev ? mddev_lock(mddev) : -ENODEV; + rv = suspend ? mddev_suspend_and_lock(mddev) : mddev_lock(mddev); if (!rv) { if (rdev->mddev == NULL) rv = -ENODEV; else rv = entry->store(rdev, page, length); - mddev_unlock(mddev); + suspend ? mddev_unlock_and_resume(mddev) : mddev_unlock(mddev); } if (kn)